I snuck in once at night during undergrad with two friends. We ran around the field (covering 100 yards never seemed so insignificant; the Big House never seemed BIGger), and then got some instinctual jitters and ran out.

To cut out a lot of a long story: We wound up getting chased (from a long distance) by the cops.

A night worth remembering.

Anyway, the lights were on that night as well. It was a wee bit magical.